Company for jalousie, shades, Vienna

We just recently moved into new place and building's wall is so solid that neither me nor professional builder can drill in holes for curtain holders. Therefore our only option stays with "jalousie", shades. Do you, by any chance have any contact, or can recommend company which is not only good to work with, but can also speak English (Slovak, or Czech)?Any suggestions, recommendations are highly appreciated.Thanks in advance, Dan.